Transverse connecting device and reduction and fixation system using the same

Abstract

The present disclosure provides a transverse connecting device and a reduction and fixation system using the same. The transverse connecting device includes a connecting rod, wherein the connecting rod is provided with clamping heads, a lower end of each of the clamping heads is provided with two clamping arms, a clamping groove is formed between the two clamping arms, one of the two clamping arms is provided with a transverse through hole, the vertical through hole is internally threaded with a screw plug, a lower end of the screw plug abuts against a side of a first sliding block away from the clamping groove, when the screw plug is screwed into the vertical through hole, the screw plug pushes the first sliding block to slide into the clamping groove along the transverse through hole.

The invention claimed is: 
     
         1 . A reduction and fixation system using a transverse connecting device, which comprises: a connecting rod provided with clamping heads at two ends respectively, two clamping arms, namely a first clamping arm and a second clamping arm, provided at a lower end of each of clamping heads, a clamping groove formed between the first clamping arm and the second clamping arm, a transverse through hole provided on the first clamping arm or the second clamping arm, a vertical through hole internally threaded with a screw plug, and a first sliding block having a side away from the clamping groove abuts against a lower end of the screw plug, when the screw plug is screwed into the vertical through hole, the screw plug pushes the first sliding block to slide into the clamping groove along the transverse through hole, the first sliding block is provided with a first clamping slot, a wall of the transverse through hole is provided with a first clamping block, and the first clamping block is located in the first clamping slot,
 the reduction and fixation system comprising: a vertebral body distraction support pin, an upper pedicle screw and a lower pedicle screw, wherein the vertebral body distraction support pin is installed on a fractured vertebral body, the upper pedicle screw and the lower pedicle screw are respectively installed on an upper vertebral body and a lower vertebral body of the fractured vertebral body, a fixing rod is connected between the upper pedicle screw and the lower pedicle screw, the clamping heads of the transverse connecting device clamp the fixing rod through the clamping groove, and the connecting rod of the transverse connecting device is fixedly connected to the vertebral body distraction support pin.   
     
     
         2 . The reduction and fixation system according to  claim 1 , wherein a supporting block is fixedly connected to the vertebral body distraction support pin, the supporting block is provided with an installation groove, the connecting rod of the transverse connection device is inserted into the installation groove, a screw is screwed between two groove walls of the installation groove, the screw abuts against the connecting rod of the transverse connecting device, and the screw fixes the connecting rod in the installation groove. 
     
     
         3 . The reduction and fixation system according to  claim 2 , wherein the vertebral body distraction support pin comprises a pin body and a pin cap, the pin body comprises an inner core, an outer sleeve and an expansion balloon, the inner core is screwed into the outer sleeve, an upper end and a lower end of the inner core extend out of the outer sleeve, the lower end of the inner core is provided with a tapered pin head, the expansion balloon is sleeved on the inner core between the tapered pin head and the lower end of the outer sleeve, the pin cap comprises an upper pin cap and a pressurizing cap, the upper pin cap has a cylindrical structure, a lower end of a barrel cavity of the upper pin cap is connected to an upper end of the outer sleeve, an upper end of the inner core extends to an upper end of the barrel cavity of the upper pin cap, and the upper end of the inner core is clamped and slidably connected with the pressurizing cap, the pressurizing cap is clamped and slidably connected with the upper pin cap and can slide along the axial direction of the inner core and the upper pin cap, when the pressurizing cap slides upward along the axial direction of the upper pin cap to release a clamping sliding connection with the upper pin cap, the pressurizing cap still keeps the clamping sliding connection with the inner core, when the tapered pin head moves near the lower end of the outer sleeve, the expansion balloon expands, the tapered pin head and the expansion balloon in an expanding state are both located in the fractured vertebral body, the supporting block is fixedly connected to an outer wall of the outer sleeve, and the supporting block is located outside the fractured vertebral body. 
     
     
         4 . The reduction and fixation system according to  claim 3 , wherein the expansion balloon comprises an upper collar and a lower collar, both of which are sleeved on the inner core between the tapered pin head and the lower end of the outer sleeve, the upper collar abuts against the lower end of the outer sleeve, the lower collar abuts against the upper end of the tapered pin head, a plurality of expansion pieces are fixedly connected between the upper collar and the lower collar, the expansion pieces are circumferentially arranged along the inner core, when the tapered pin head moves close to the lower end of the outer sleeve, the expansion pieces can bulge and deform away from the inner core, the upper pin cap is fixedly connected with two first lugs, and the pressurizing cap is fixedly connected with two second lugs. 
     
     
         5 . The reduction and fixation system according to  claim 4 , wherein the upper pin cap comprises an upper barrel and a lower barrel which are integrally formed, an inner barrel diameter of the upper barrel is larger than an inner barrel diameter of the lower barrel, the upper end of the outer sleeve has a hollow prism structure, a lower part of a barrel cavity of the lower barrel has a prism shape matched with the upper end of the outer sleeve, an upper part of the barrel cavity of the lower barrel is provided with a first clamping table, the lower part of the barrel cavity of the lower barrel is sleeved on the upper end of the outer sleeve, the upper end of the outer sleeve abuts against the first clamping table, and the upper end of the inner core passes through the barrel cavity of the lower barrel and extends into the barrel cavity of the upper barrel. 
     
     
         6 . The reduction and fixation system according to  claim 5 , wherein the outer wall of the outer sleeve is provided with a second clamping table, and the lower end of the lower barrel abuts against the second clamping table. 
     
     
         7 . The reduction and fixation system according to  claim 6 , wherein the upper end of the inner core has a prismatic structure, the pressurizing cap has a cylindrical structure, the barrel cavity of the pressurizing cap has a prismatic shape matching with the upper end of the inner core, the pressurizing cap is sleeved on the upper end of the inner core, the outer wall of the pressurizing cap is fixedly provided with a second clamping block, the inner wall of the upper barrel is provided with a second clamping slot axially arranged, the second clamping block is positioned in the second clamping slot and can slide along the second clamping slot, when the pressurizing cap slides upward along the axial direction of the upper pin cap to make the second clamping block separate from the second clamping slot, and the pressurizing cap is still sleeved on the upper end of the inner core. 
     
     
         8 . The reduction and fixation system according to  claim 6 , wherein an outer side wall of the upper end of the inner core is provided with a projection axially arranged, the barrel cavity of the pressurizing cap is provided with a groove axially arranged, the pressurizing cap is sleeved on the upper end of the inner core, the projection is located in the groove, the projection can slide along the groove, the outer wall of the pressurizing cap is fixedly provided with a second clamping block, the inner wall of the upper barrel is provided with a second clamping slot axially arranged, the second clamping block is positioned in the second clamping slot and can slide along the second clamping slot, when the pressurizing cap slides upward along the axial direction of the upper pin cap to make the second clamping block separate from the second clamping slot, and the pressurizing cap is still sleeved on the upper end of the inner core and the projection is located in the groove; or
 the outer side wall of the upper end of the inner core is provided with the groove axially arranged, the barrel cavity of the pressurizing cap is provided with the projection axially arranged, the pressurizing cap is sleeved on the upper end of the inner core, the projection is located in the groove, the projection can slide along the groove, the outer wall of the pressurizing cap is fixedly provided with a second clamping block, the inner wall of the upper barrel is provided with a second clamping slot axially arranged, the second clamping block is positioned in the second clamping slot and can slide along the second clamping slot, when the pressurizing cap slides upward along the axial direction of the upper pin cap to make the second clamping block separate from the second clamping slot, and the pressurizing cap is still sleeved on the upper end of the inner core and the projection is located in the groove.   
     
     
         9 . A reduction and fixation system using a transverse connecting device, which comprises: a connecting rod provided with clamping heads at two ends respectively, a second clamping arm and a first clamping arm provided at a lower end of each of the clamping heads respectively with the first clamping arm located between the connecting rod and the second clamping arm, a clamping groove formed between the first clamping arm and the second clamping arm, a transverse through hole provided on the first clamping arm, a vertical through hole internally threaded with a screw plug, and a first sliding block having a side away from the clamping groove abuts against a lower end of the screw plug when the screw plug is screwed into the vertical through hole, the screw plug pushes the first sliding block to slide into the clamping groove along the transverse through hole, the first sliding block is provided with a first clamping slot, a wall of the transverse through bole is provided with a first clamping block, and the first clamping block is located in the first clamping slot,
 the reduction and fixation system comprising: a vertebral body distraction support pin, an upper pedicle screw and a lower pedicle screw, wherein the vertebral body distraction support pin is installed on a fractured vertebral body, the upper pedicle screw and the lower pedicle screw are respectively installed on an upper vertebral body and a lower vertebral body of the fractured vertebral body, a fixing rod is connected between the upper pedicle screw and the lower pedicle screw, the clamping heads of the transverse connecting device clamp the fixing rod through the clamping groove, and the connecting rod of the transverse connecting device is fixedly connected to the vertebral body distraction support pin.   
     
     
         10 . The reduction and fixation system according to  claim 9 , wherein a supporting block is fixedly connected to the vertebral body distraction support pin, the supporting block is provided with a first through hole, the hole wall of the first through hole is provided with a second through hole, the connecting rod of the transverse connecting device is inserted into the first through hole, the second through hole is threaded with a screw, and the screw abuts against the connecting rod of the transverse connecting device. 
     
     
         11 . The reduction and fixation system according to  claim 10 , wherein the vertebral body distraction support pin comprises a pin body and a pin cap, the pin body comprises an inner core, an outer sleeve and an expansion balloon, the inner core is screwed into the outer sleeve, an upper end and a lower end of the inner core extend out of the outer sleeve, the lower end of the inner core is provided with a tapered pin head, the expansion balloon is sleeved on the inner core between the tapered pin head and the lower end of the outer sleeve, the pin cap comprises an upper pin cap and a pressurizing cap, the upper pin cap has a cylindrical structure, a lower end of a barrel cavity of the upper pin cap is connected to an upper end of the outer sleeve, an upper end of the inner core extends to an upper end of the barrel cavity of the upper pin cap, and the upper end of the inner core is clamped and slidably connected with the pressurizing cap, the pressurizing cap is clamped and slidably connected with the upper pin cap and can slide along the axial direction of the inner core and the upper pin cap, when the pressurizing cap slides upward along the axial direction of the upper pin cap to release a clamping sliding connection with the upper pin cap, the pressurizing cap still keeps the clamping sliding connection with the inner core, when the tapered pin head moves near the lower end of the outer sleeve, the expansion balloon expands, the tapered pin head and the expansion balloon in an expanding state are both located in the fractured vertebral body, the supporting block is fixedly connected to an outer wall of the outer sleeve, and the supporting block is located outside the fractured vertebral body. 
     
     
         12 . The reduction and fixation system according to  claim 11 , wherein the expansion balloon comprises an upper collar and a lower collar, both of which are sleeved on the inner core between the tapered pin head and the lower end of the outer sleeve, the upper collar abuts against the lower end of the outer sleeve, the lower collar abuts against the upper end of the tapered pin head, a plurality of expansion pieces are fixedly connected between the upper collar and the lower collar, the expansion pieces are circumferentially arranged along the inner core, when the tapered pin head moves close to the lower end of the outer sleeve, the expansion pieces can bulge and deform away from the inner core, the upper pin cap is fixedly connected with two first lugs, and the pressurizing cap is fixedly connected with two second lugs. 
     
     
         13 . The reduction and fixation system according to  claim 12 , wherein the upper pin cap comprises an upper barrel and a lower barrel which are integrally formed, an inner barrel diameter of the upper barrel is larger than an inner barrel diameter of the lower barrel, the upper end of the outer sleeve has a hollow prism structure, a lower part of a barrel cavity of the lower barrel has a prism shape matched with the upper end of the outer sleeve, an upper part of the barrel cavity of the lower barrel is provided with a first clamping table, the lower part of the barrel cavity of the lower barrel is sleeved on the upper end of the outer sleeve, the upper end of the outer sleeve abuts against the first clamping table, and the upper end of the inner core passes through the barrel cavity of the lower barrel and extends into the barrel cavity of the upper barrel. 
     
     
         14 . The reduction and fixation system according to  claim 13 , wherein the outer wall of the outer sleeve is provided with a second clamping table, and the lower end of the lower barrel abuts against the second clamping table. 
     
     
         15 . The reduction and fixation system according to  claim 14 , wherein the upper end of the inner core has a prismatic structure, the pressurizing cap has a cylindrical structure, the barrel cavity of the pressurizing cap has a prismatic shape matching with the upper end of the inner core, the pressurizing cap is sleeved on the upper end of the inner core, the outer wall of the pressurizing cap is fixedly provided with a second clamping block, the inner wall of the upper barrel is provided with a second clamping slot axially arranged, the second clamping block is positioned in the second clamping slot and can slide along the second clamping slot, when the pressurizing cap slides upward along the axial direction of the upper pin cap to make the second clamping block separate from the second clamping slot, and the pressurizing cap is still sleeved on the upper end of the inner core. 
     
     
         16 . The reduction and fixation system according to  claim 14 , wherein an outer side wall of the upper end of the inner core is provided with a projection axially arranged, the barrel cavity of the pressurizing cap is provided with a groove axially arranged, the pressurizing cap is sleeved on the upper end of the inner core, the projection is located in the groove, the projection can slide along the groove, the outer wall of the pressurizing cap is fixedly provided with a second clamping block, the inner wall of the upper barrel is provided with a second clamping slot axially arranged, the second clamping block is positioned in the second clamping slot and can slide along the second clamping slot, when the pressurizing cap slides upward along the axial direction of the upper pin cap to make the second clamping block separate from the second clamping slot, and the pressurizing cap is still sleeved on the upper end of the inner core and the projection is located in the groove; or
 the outer side wall of the upper end of the inner core is provided with the groove axially arranged, the barrel cavity of the pressurizing cap is provided with the projection axially arranged, the pressurizing cap is sleeved on the upper end of the inner core, the projection is located in the groove, the projection can slide along the groove, the outer wall of the pressurizing cap is fixedly provided with a second clamping block, the inner wall of the upper barrel is provided with a second clamping slot axially arranged, the second clamping block is positioned in the second clamping slot and can slide along the second clamping slot, when the pressurizing cap slides upward along the axial direction of the upper pin cap to make the second clamping block separate from the second clamping slot, and the pressurizing cap is still sleeved on the upper end of the inner core and the projection is located in the groove.